The only way I know is to split the video in two parts (200 frames and the rest), do the changes to the first part, render it, and than join the parts.
BUT! To join parts without decoding the second one, you must render the first one with exactly the same parameters (codecs and so on). There are different programs for splitting and joining footage without ...
highlight the strip, open panel (press N if closed), find the Volume field and change the value.
You can animate the value, set to zero at the last frame and keyframe it by pressin I while hovering it, than $1$ (or any other) several frames earlier.